write the first hour torns of an Ap
whose first town is 2 and the common
Difference is - 2
Answers
Answered by
0
Answer:
11
Step-by-step explanation:
Sum of first n terms Sn=n/2[2a+(n-1)*d]
n/2[2×8+(n-1)×20]=2n/2[2×-30+(2n-1)×8]
16+20n-20=2(-60+16n-8)
-4+20n=2(-68+16n)
-2+10n=-68+16n
66=6n
n=11
Answered by
0
Step-by-step explanation:
a=2 d=-2
t1=2
t2=a+d=2-2=0
t3=a+2d=2-4=-2
t4=a+3d=2-6=-4
hope it helps you...pls mark as brainliest
Similar questions