Question

दी हुई A.P. प्रथम चार पद लिखिए, जबकि प्रथम पद a और सार्व अंतर d निम्नलिखित हैंः
(i) a = 10, d = 10
(ii) a = − 2, d = 0
(iii) a = 4, d = − 3
(iv) a = − 1 d =$\frac{1}{2}$
(v) a = − 1.25, d = − 0.25

Answer 1

A.P के प्रथम चार पद : a , a + d , a + 2d , a + 3d

(i) a = 10, d = 10
प्रथम पद = a = 10
द्वितीय पद = a + d = 10 + 10 = 20
तृतीय पद = a + 2d = 10 + 2 × 10 = 30
चतुर्थ पद = a + 3d = 10 + 3 × 10 = 40

(ii) a = -2, d = 0
प्रथम पद = a = -2
द्वितीय पद = a + d = -2 + 0 = -2
तृतीय पद = a + 2d = -2 + 2 × 0 = -2
चतुर्थ पद = -2 + 3 × 0 = -2

(iii) a = 4 , d = -3
प्रथम पद = a = 4
द्वितीय पद = a + d = 4 - 3 = 1
तृतीय पद = a + 2d = 4 + 2 × -3 = -2
चतुर्थ पद = 4 + 3 × -3 = -5

(iv) a = − 1 d =$\frac{1}{2}$
प्रथम पद = a = -1
द्वितीय पद = a + d = -1 + 1/2 = -1/2
तृतीय पद = a + 2d = -1 + 2 × 1/2 = 0
चतुर्थ पद = a + 3d = -1 + 3 × 1/2 = 1/2

(v) a = -1.25 , d = -0.25
प्रथम पद = a = -1.25
द्वितीय पद = a + d = -1.25 - 0.25 = -1.5
तृतीय पद = a + 2d = -1.25 + 2 × -0.25 = -1.75
चतुर्थ पद = a + 3d = -1.25 + 3 × -0.25 = -2.00