Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

The formula for the sum of first n terms of a AP is n/2(2a+(n-1)d) here n=16 a=10 d=6-10=2-6=-4 so sum of first 16 terms=16/2(2·10+(16-1)·-4) =8(20+15·-4) =8(20-60) =8(-40) =-320 therefore the option is A