Question

for what value of p are 2p+1,13,5p-3are three consecutive terms of an a.p

Answer 1

2p+1+5p-3=26
7p-2=26
p=4

Answer 2

according to AP,

2b=a+c;
means,
2*13= (2p+1)+(5p-3);
26=(2p+5p)+(1-3);
26=(7p)-2;
26+2=7p;
7p=28;
p=4;

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