Question

in an ap given a=-4,d=3 find 20thterm and sun of first 20 terms​

Answer 1

Step-by-step explanation:

a20=a+19d

=-4+19×3

= -53

S20= 10/2{2a+(20-1)d}

=5{2×-4+19×3}

=5(-8+57)

=5×-49

=-245

Answer 2

Answer:

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