Question

The sum of first 18 terms of an AP whose nth term is 3 - 2n is​

Answer 1

ANSWER:

Sn=3-2n

Sn=3-2ns1=3-2(1)

Sn=3-2ns1=3-2(1)s1=3-2

Sn=3-2ns1=3-2(1)s1=3-2s1=1

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)s2=3-4

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)s2=3-4s2=-1

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)s2=3-4s2=-1tn=sn-sn-1

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)s2=3-4s2=-1tn=sn-sn-1t2=1-1

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)s2=3-4s2=-1tn=sn-sn-1t2=1-1t2=0

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)s2=3-4s2=-1tn=sn-sn-1t2=1-1t2=0d=tn-tn-1

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)s2=3-4s2=-1tn=sn-sn-1t2=1-1t2=0d=tn-tn-1d=0-1

Sn=3-2ns1=3-2(1)s1=3-2s1=1a=1s2=3-2(2)s2=3-4s2=-1tn=sn-sn-1t2=1-1t2=0d=tn-tn-1d=0-1d=-1

hope its help you

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Answer 2

Answer:

Step-by-step explanation:

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