# Ignore negative coefficients when computing values to a 'power'

How can I write a formula to exclude negative coefficients when summing values to a 'power' , in a row.
example:

A    B   C   D
2    2   -2   3

=10^A2+10^B2+10^C2+5^D2   would return 0
ignoring C
=10^A2+10^B2+5^D2     =   325
(The formula extend to around 20 columns)
Thanks
Ian
###### Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Commented:
Hi,
pls try( As an array formula Ctrl+Shift+Enter)
``````=SUM(IF((A2:D2)>0,(A1:D1)^(A2:D2),0))
``````
Regards
0
Commented:
As a normal formula
``````=SUMPRODUCT((A2:D2>0)*(A1:D1)^(A2:D2))
``````
0

Experts Exchange Solution brought to you by

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

retiredAuthor Commented:
Thanks to both, I prefer the normal formula and is best for my needs. Whatever happened to the shared system ?
Sorry Rgonzo if you feel you are entitled to award points let someone know as you were first in with a solution.
Ian
0
###### It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Office

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.